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Old 12/31/2007, 07:45 PM   #11
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Join Date: Oct 2004
Location: Los Angeles, CA
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o.c.d. - most polychaetes have the same general body structure. Distinctions come from the appendages and type of setae (= bristles). The books usually list 10 or less of the bigger worms. There's perhaps 10,000 described species of polychaetes and a unknown - but high - number of undescribed ones. The same is true for shrimp, crabs, and all the other inverts. The incredible biodiversity is part of what makes marine biology so much fun.

Cheers, Leslie
So many worms, so little time...
Natural History Museum of Los Angeles County
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